Daniel Häussinger, Marcel Mayor and co-workers at University of Basel in Switzerland look at the physical organic aspects of push-pull biaryls and their dynamic conformational interchange for the preparation of bulk organic materials that will display non-linear optical activities.
Two main physical properties are crucial for a strong nonlinear optic response: a large hyperpolarizability of the chromophore and a noncentrosymmetric centre.
In this HOT paper, the authors describe the rotational barriers for atropisomer interconversion in a series of cyclophane derivatives functionalized with complementary electron donating/withdrawing substituents. The referees said that it was a very significant paper in the fied.
You can now read it for free until the end of the year.
Racemisation dynamics of torsion angle restricted biphenyl push-pull cyclophanes
Jürgen Rotzler, Heiko Gsellinger, Markus Neuburger, David Vonlanthen, Daniel Häussinger and Marcel Mayor
Org. Biomol. Chem., 2011, Advance Article
DOI: 10.1039/C0OB00650E, Paper
